Oil filter



May 17, 1927' J; w. DE FRIES OIL FILTER Filed May 1 Patented May 17, 1927.

UNITED STATES,

JOHN W. DE PRIZES,

or MccoY, onEGoN.

' on FILTER.

Application filed May 12,

This invention relates to oil filters primarily adapted for installation in'the oil feed line of an automobile internal combustion engine for filtering the oil prior to the passage of the same-into the working parts of the engine for preventingthe accumulation of grit, metal .particles and the like within the engine bearing, cylinders, etc. which materially impairs the operation of the en- 1o gine.

The invention further aims to provide an oil filter of the aforementioned character that is relatively simple in construction, comprising few parts. that may be readily separated for repair or renewal purposes.

An additional object of the invention will become apparent as the nature of the invention is better understood, the same comprising the novel form, combination, and arrangement of parts hereinafter more fully described, shown in the accompanying drawing and claimed. I

In the drawing wherein like reference characters indicate corresponding parts 2 throughout the several .views:

Figure 1 is-a vertical detail section of an oil filter constructed in accordance with the present invention.-

Figure 2 is a bottom lan view of the upper cylindrical section oi the filter.

Figure 3 is a top plan view of the lower cylindrical section, and M Figure 4 is a plan View of the oil filter in 'unit,per se. a

ow having particular reference to the drawing, .my novel filter constitutes the provision of a pair .of interfitting cylindrical-sections 5 and6 adapted for arrangement in superposed relation as clearlydisclosed in Figure 1. The upper cylindricalse'ction 5 is formed with a central circular opening 7 within its bottom wall 8, the top wall 9 of whichis formed with a central internally threaded cap 16 within which is normally a plug for closing the same. The side wall of this upper cylindrical section is formed at its upper end with diametrically opposed internally threaded inlet and outlet nipples 11 and 12 respectively within which are adapted for arrangement oil pipes (notsho-wn). the, oil pipe associated with thenipple 11 leading from the oil pump while the pipe within. the nipple 12 leads to the working part of the engine. p

The side .Wall (if the cylindrical section 5 upwardly into, the section 5 the top sections 5 and the top wall 13 of the -the oil channel 8' m-the bottom wall of the 1926. Serial N0. 108,570/

depends from the bottom wall 8 thereof and is internally threaded as shown for receiving the externally threaded upper end of the lower cylindrical section 6 which is of lesser cross sectional area than the upper section as disclosed. The top wall 13 of this lower section is formed centrally with a circular opening 14 that registers with the opening 7- in thebottoinwall 8 of the topsection 5 when arranged within the top section so,as to permit the oil to flow from the section'6 and thence through the nipple -12.

The adjacent faces of the'bottom'wall 8 of 7 lower section 6 are formed concentrically with the openings with oil conveying grooves 8 and 13 respectively, while adapted for clamping engagement between said walls of the sections is the annular metallic rim .15 of a filtering disc 16 preferably consisting of a pair of spaced circular screen stri between which may be and preferably 1s arranged a suitable porous filtering fabric (not shown). I

Formed vertically within the upper cylin- I drica-l section -5 at the side wall thereofand in communication with the'inlet 11 is an oil pipe 17 that conveys the oil downwardly to section 5 whence it passes through-openin s 18 in the rim 15 of the filtering unit whicn openings are to be placed in re istration with openings '19 extending-throng the top wall 13 of the lower section 6 leadin from its channel 13 in order that the oil Wlll flow" into the section 6, and by the continued action of the pump, the same will be forced upwardly through the filteringunit into the upper section 5 through the d scharge12anto the engineby reason of the pipe SOCtlOII (not 7 shown).

The lower section 6 is also constructed at its bottom wall with a cap 20 in order that the filter may be cleaned by airpressure and this obviously by applying an air pipe to the cap 10 of the section 5 which wlll forc bly discharge the sediment through the cap 20.

It will thus be seen/that I have rovided a highly novel, simple. and efiicient orm of 011 filter for automobile engines that is well adaptedfor all the purposes heretofore designated, even though I have herein shown and described the invention as consistmg of certain detail structural elements it is neverters Patent is In'-an oil filter of the class described a pair of interfitting cylindrical filter cham 1 sections arranged in superposed relation, the upper section being formed with inlet and outlet openings adjacent the top thereof, the

adjacent bottom and top wall of the upper and lower sections being formed centrally with rcgisterin'gopenings, the adjacent faces of said walls being forme'l' with oil channels arranged concentrically of the openings, a filter screen arranged horizontally between the bottom and top walls of the upper-and lower sections respectively, andconsisting of a. metallic ring, and a filter screen within .the center thereof, said ring being formed with spaced openings adapted to register with the aforementioned oil channels, the top wall of the lower section being formed with openings in registration with the openings in said filteriu ring for permitting the oil to ass into the ower section, and a pipe form within the upper section for delivering the oil from the inlet opening to the oil channel in the bottom wall of the upper section, the oil thence passing through the openings in the filter rin and the lower section topwall into said ower section and thence upwardly through the filter screen into the upper section, and then through the outlet opening of said upper section.

.I-n testiniony whereof I aflix my signature.

- JOHN W. DE PRIES. 

